CN212650787U

CN212650787U - a cleaning machine

Info

Publication number: CN212650787U
Application number: CN202021554772.7U
Authority: CN
Inventors: 贾一凡
Original assignee: Individual
Current assignee: Hainan Hairun Pearl Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-03-05
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses a cleaning machine, which belongs to the technical field of cleaning equipment, and specifically comprises a main engine, a plunger pump mechanism, a centrifugal pump mechanism and a charging base; wherein, a water storage tank and a recovery water tank are arranged inside a casing, and a lower surface of the casing is provided with a water storage tank and a recovery water tank. There is an electromagnetic sensor receiving end, the plunger pump mechanism and the centrifugal pump mechanism are all arranged in the casing. The centrifugal pump mechanism includes a suction head, a suction pipe, a gas pipe and a micro centrifugal pump. The suction head is arranged at the front end of the casing. Brush scraper and straight scraper, the upper surface of the base body is matched with the lower surface of the shell, the upper surface of the base body is provided with the transmitting end of the electromagnetic sensor, the transmitting end of the electromagnetic sensor is matched with the receiving end of the electromagnetic sensor, and the interior of the base body is also provided with With an ozone generator, the utility model is small in size, easy to carry, and easy to operate. Ozone can be added to the water in the water storage tank at any time to improve the cleaning effect, without the coordination of traditional cleaning tools, and the convenience is greatly improved.

Description

Cleaning machine

Technical Field

The utility model relates to a cleaning equipment technical field specifically is a cleaning machine.

Background

Traditional cleaning machine is bulky, and mobility is poor, is not portable to mostly only adopt clear water cooperation cleaner to wash, the cleaning performance is poor, and in cleaning process or completion back, the processing of sewage need be through the supplementary clean of wiping of other instruments, and is more troublesome moreover, consequently, this problem that exists among the prior art is solved to a quick-witted modified technique that awaits urgent need.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cleaning machine, small in size, and is convenient to carry, be provided with the hose box in the charging seat, can place the hose in the hose box, through the inside ozone generator of charging seat, can add ozone to the aquatic in the storage water tank at any time, in order to improve the cleaning performance, inside plunger pump mechanism and the centrifugal pump mechanism of being provided with of casing, spray water in treating the washing region through plunger pump mechanism, rethread centrifugal pump mechanism can be with the sewage recovery after the washing, need not the cooperation of the cleaning means of traditional rag or mop, the convenience improves greatly, in order to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a cleaning machine comprises a host, a plunger pump mechanism, a centrifugal pump mechanism and a charging seat;

the main machine comprises a shell, a water storage tank and a recovery water tank; the rear end of the shell is provided with a handle, a plurality of energy storage batteries are arranged in the handle, a first touch switch and a second touch switch are respectively arranged on two sides of the handle, a water storage tank and a recovery water tank are arranged in the shell, the water storage tank is arranged at the upper end of the recovery water tank, and the lower surface of the shell is also provided with an electromagnetic sensor receiving end;

the plunger pump mechanism comprises a sleeve, a spray pipe, a piston and a motor, wherein a water inlet pipe is arranged at the top end of the sleeve, one end of the sleeve is connected with the spray pipe, the spray pipe is arranged in the shell, one end, far away from the sleeve, of the spray pipe is arranged at the front end of the shell, the piston is arranged in the sleeve and is connected with a connecting rod, one end, far away from the piston, of the connecting rod is connected with a mouse tooth disc, a gear is arranged on an output shaft of the motor, and the gear is meshed with the mouse tooth disc;

the centrifugal pump mechanism comprises a water suction head, a water suction pipe, an air pipe and a micro centrifugal pump, wherein the water suction head is arranged at the front end of the shell, a hairbrush scraper and a straight scraper are arranged on the water suction head, the water suction head is connected with the water suction pipe, the water suction pipe is arranged in the shell, one end, far away from the water suction head, of the water suction pipe is connected with a recovery water tank, the air pipe is connected with the micro centrifugal pump, the air pipe and the micro centrifugal pump are both arranged in the shell, and the air pipe is connected with one end, far away;

the charging seat comprises a seat body, a hose box and an ozone generator, wherein the upper surface of the seat body is matched with the lower surface of the shell, the upper surface of the seat body is provided with an electromagnetic sensor transmitting end, the electromagnetic sensor transmitting end is matched with an electromagnetic sensor receiving end, the front end of the seat body is provided with the hose box, the ozone generator is further arranged inside the seat body, the ozone generator is connected with a connecting pipe, the connecting pipe is arranged inside the seat body, and the two sides of the seat body are respectively provided with a third touch switch and a charging port.

Preferably, the utility model provides a pair of cleaning machine, wherein, the upper end of storage water tank is provided with the water inlet, the casing upper surface still is provided with first rubber stopper, first rubber stopper mutually supports with the water inlet of storage water tank for the shutoff storage water tank.

Preferably, the utility model provides a pair of cleaning machine, wherein, the recovery water tank lower surface is provided with the outlet, the casing lower surface still is provided with the second rubber stopper, the second rubber stopper is mutually supported with recovery water tank's outlet for the sewage in shutoff and the discharge recovery water tank.

Preferably, the utility model provides a pair of cleaning machine, wherein, the connecting pipe passes through the support to be fixed in the seat, ozone generator one end is kept away from to the connecting pipe links to each other with the joint for with hose connection.

Preferably, the utility model provides a pair of cleaning machine, wherein, hose box lower surface is provided with the lid, the activity is provided with the hose in the hose box, hose end cooperatees with the joint of connecting pipe one end, the other end of hose passes through the water inlet activity and sets up in the storage water tank, is convenient for mix ozone to the aquatic of storage water tank through ozone generator.

Preferably, the utility model provides a pair of cleaning machine, wherein, inlet tube and muffjoint one end and spray pipe all are provided with the check valve with muffjoint one end, avoid the clear water backward flow.

Preferably, the utility model provides a pair of cleaning machine, wherein, first touch switch passes through the wire and links to each other with motor and energy storage battery respectively, second touch switch passes through the wire and links to each other with micro-centrifugal pump and energy storage battery respectively, energy storage battery passes through the wire and links to each other with the electromagnetic sensor receiving terminal, realizes the control of motor through first touch switch, realizes the control of micro-centrifugal pump through second touch switch.

Preferably, the utility model provides a pair of cleaning machine, wherein, the inside PCB board that still is provided with of pedestal, the PCB board links to each other with mouth and the electromagnetic sensor transmitting terminal that charges respectively for the electromagnetic sensor transmitting terminal and the intercommunication of the mouth that charges, the PCB board still links to each other with third touch switch and ozone generator respectively through the wire, realizes ozone generator's control through third touch switch.

Preferably, the utility model provides a pair of cleaning machine, wherein, mouse chain wheel lower surface is provided with the eccentric post, the connecting rod is kept away from piston one end and is provided with the stop collar, the activity of eccentric post sets up in the stop collar, the guide way has been seted up to the stop collar, the axle core of mouse chain wheel sets up in the guide way of stop collar, and through the rotation of mouse chain wheel, rethread connecting rod drives the piston and makes piston motion in the sleeve.

A second object of the present invention is to provide a cleaning machine, which comprises the following steps:

the method comprises the following steps: opening the first rubber plug, and feeding water through a water inlet of the water storage tank;

step two: taking the hose out of the hose box of the base body, connecting one end of the hose with a joint at one end of a connecting pipe, inserting the other end of the hose into the water storage tank through a water inlet, and turning on the ozone generator through a third touch switch to enable ozone to be fused with water in the water storage tank;

step three: turning off the ozone generator, taking down the hose, holding the handle, taking down the body from the seat body, starting the motor through the first touch switch, driving the piston to do piston motion in the sleeve through the gear, the mouse tooth disc and the connecting rod by the motor, thereby pumping out water in the water storage tank through the water inlet pipe and spraying the water out of the water spray pipe to a target area for cleaning;

step four: after cleaning, starting the micro centrifugal pump through a second touch switch, placing the water suction head in a cleaned area, gathering water through the brush scraper and the straight scraper, and sucking the water into the recovery water tank from the water suction pipe through negative pressure;

step five: and opening the second rubber plug, discharging the wastewater in the recovery water tank, covering the second rubber plug, placing the shell on the seat body, enabling the electromagnetic sensor receiving end and the electromagnetic sensor transmitting end to be matched with each other, inserting the power line on a charging port, and charging the energy storage battery.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) small volume and convenient carrying.

(2) A hose box is arranged in the charging seat, a hose can be placed in the hose box, and ozone can be added into water in the water storage tank at any time through an ozone generator inside the charging seat so as to improve the cleaning effect.

(3) Inside plunger pump mechanism and the centrifugal pump mechanism of being provided with of casing, spray water in treating the washing area through plunger pump mechanism, sewage after the rethread centrifugal pump mechanism can be with wasing retrieves, need not the cooperation of the cleaning means of traditional rag or mop, and the convenience improves greatly.

(4) The first touch switch and the second touch switch for controlling the motor and the micro centrifugal pump are respectively arranged on two sides of the handle, so that the operation is very convenient.

(5) A brush scraper and a straight scraper are arranged on a water absorption head of the centrifugal pump mechanism, and the brush scraper and the straight scraper are matched for cleaning and are convenient for collecting sewage.

(6) Adopt wireless charging, take along with using, mobility improves greatly

(7) Adopt first rubber stopper and second rubber stopper shutoff storage water tank and recovery water tank respectively, when using, the condition that can not take place to leak, after using, be convenient for add water or drainage.

Drawings

Fig. 1 is a schematic view of a front view structure of a cleaning machine of the present invention;

fig. 2 is a schematic view of a rear view structure of the cleaning machine of the present invention;

FIG. 3 is a schematic view of the internal structure of a main frame of the cleaning machine of the present invention;

FIG. 4 is a schematic view of the internal structure of a main unit of the cleaning machine (not shown) of the present invention;

FIG. 5 is a schematic structural view of a centrifugal pump mechanism of the cleaning machine of the present invention;

fig. 6 is a schematic structural view of a centrifugal pump mechanism (not shown) of a cleaning machine according to the present invention;

fig. 7 is a schematic view of a structure of a mouse tray of the cleaning machine of the present invention;

fig. 8 is a schematic view of a charging seat of the cleaning machine of the present invention;

fig. 9 is a schematic view of the charging seat of the cleaning machine according to the present invention;

fig. 10 is a schematic view of the internal structure of a charging seat of the cleaning machine of the present invention;

fig. 11 is a schematic diagram of the state that the host and the charging seat of the cleaning machine of the utility model adopt the hose to charge ozone into the water storage tank.

In the figure: the device comprises a shell 1, a water storage tank 2, a recovery water tank 3, a handle 4, an energy storage battery 5, a first touch switch 6, a second touch switch 7, an electromagnetic sensor receiving end 8, a sleeve 9, a water spray pipe 10, a piston 11, a motor 12, a water inlet pipe 13, a connecting rod 14, a mouse tooth disc 15, a gear 16, a water suction head 17, a water suction pipe 18, an air pipe 19, a micro centrifugal pump 20, a brush scraper 21, a straight scraper 22, a base body 23, a hose box 24, an ozone generator 25, an electromagnetic sensor transmitting end 26, a connecting pipe 27, a third touch switch 28, a charging port 29, a first rubber plug 30, a second rubber plug 31, a support 32, a joint 33, a box cover 34, a hose 35, a PCB (printed circuit board) 36, an eccentric column 37 and.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention;

it should be noted that, in the description of the present invention, it is to be noted that the terms "inside", "outside", "upper", "lower", "both sides", "one end", "the other end", "left", "right", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-11, the present embodiment provides a cleaning machine, which includes a main body, a plunger pump mechanism, a centrifugal pump mechanism, and a charging base; the main machine comprises a shell 1, a water storage tank 2 and a recovery water tank 3; the rear end of the shell 1 is provided with a handle 4, a plurality of energy storage batteries 5 are arranged inside the handle 4, two sides of the handle 4 are respectively provided with a first touch switch 6 and a second touch switch 7, the first touch switch 6 is respectively connected with the motor 12 and the energy storage batteries 5 through leads, the second touch switch 7 is respectively connected with the micro centrifugal pump 20 and the energy storage batteries 5 through leads, the energy storage batteries 5 are connected with the electromagnetic sensor receiving end 8 through leads, the shell 1 is internally provided with a water storage tank 2 and a recovery water tank 3, the water storage tank 2 is arranged at the upper end of the recovery water tank 3, the upper end of the water storage tank 2 is provided with a water inlet, the upper surface of the shell 1 is also provided with a first rubber plug 30, the first rubber plug 30 is matched with the water inlet of the water storage tank 2, the lower surface of the recovery water tank 3 is provided with a water outlet, the lower surface of the shell, the lower surface of the shell 1 is also provided with an electromagnetic sensor receiving end 8; the plunger pump mechanism comprises a sleeve 9, a spray pipe 10, a piston 11 and a motor 12, wherein a water inlet pipe 13 is arranged at the top end of the sleeve 9, one end of the sleeve 9 is connected with the spray pipe 10, the spray pipe 10 is arranged in the shell 1, one end, far away from the sleeve 9, of the spray pipe 10 is arranged at the front end of the shell 1, one ends, connected with the sleeve 9, of the water inlet pipe 13 and the sleeve 9 as well as one ends, connected with the sleeve 10 and the sleeve 9 are respectively provided with a one-way valve, the piston 11 is arranged in the sleeve 9, the piston 11 is connected with a connecting rod 14, one end, far away from the piston 11, of the connecting rod 14 is connected with a mouse tray 15, a gear 16 is, a limiting sleeve 38 is arranged at one end, far away from the piston 11, of the connecting rod 14, the eccentric column 37 is movably arranged in the limiting sleeve 38, a guide groove is formed in the limiting sleeve 38, and a shaft core of the mouse tooth disc 15 is arranged in the guide groove of the limiting sleeve 38; the centrifugal pump mechanism comprises a water suction head 17, a water suction pipe 18, an air pipe 19 and a micro centrifugal pump 20, wherein the water suction head 17 is arranged at the front end of the shell 1, a brush scraper 21 and a straight scraper 22 are arranged on the water suction head 17, the water suction head 17 is connected with the water suction pipe 18, the water suction pipe 18 is arranged inside the shell 1, one end, far away from the water suction head 17, of the water suction pipe 18 is connected with the recovery water tank 3, the air pipe 19 is connected with the micro centrifugal pump 20, the air pipe 19 and the micro centrifugal pump 20 are both arranged in the shell 1, and the air pipe 19 is; the charging seat comprises a seat body 23, a hose box 24 and an ozone generator 25, the upper surface of the seat body 23 is matched with the lower surface of the shell 1, the upper surface of the seat body 23 is provided with an electromagnetic sensor transmitting end 26, the electromagnetic sensor transmitting end 26 is matched with an electromagnetic sensor receiving end 8, the front end of the seat body 23 is provided with the hose box 24, the seat body 23 is also internally provided with the ozone generator 25, the ozone generator 25 is connected with a connecting pipe 27, the connecting pipe 27 is arranged inside the seat body 23, the connecting pipe 27 is fixed in the seat body 23 through a support 32, one end of the connecting pipe 27 far away from the ozone generator 25 is connected with a connector 33, two sides of the seat body 23 are respectively provided with a third touch switch 28 and a charging port 29, the lower surface of the hose box 24 is provided with a box cover 34, a hose 35 is movably arranged in the hose box 24, one, the base 23 is further provided with a PCB 36 inside, the PCB 36 is connected to the charging port 29 and the electromagnetic sensor transmitting terminal 26, and the PCB 36 is further connected to the third touch switch 28 and the ozone generator 25 through wires.

A method of using a cleaning machine comprising the steps of:

the method comprises the following steps: the first rubber plug 30 is opened, and water is delivered through the water inlet of the water storage tank 2;

step two: taking the hose 35 out of the hose box 24 of the base body 23, connecting one end of the hose 35 with the joint 33 at one end of the connecting pipe 27, inserting the other end of the hose into the water storage tank 2 through the water inlet, and turning on the ozone generator 25 through the third touch switch 28 to enable the ozone to be fused with the water in the water storage tank 2;

step three: the ozone generator 25 is turned off, the hose 35 is taken down, the handle 4 is held, the machine body is taken down from the seat body 23, the motor 12 is started through the first touch switch 6, the motor 12 drives the piston 11 to move in the sleeve 9 as the piston 11 through the gear 16, the mouse toothed disc 15 and the connecting rod 14, and therefore water in the water storage tank 2 is pumped out through the water inlet pipe 13 and is sprayed out from the water spray pipe 10 to a target area for cleaning;

step four: after the cleaning is finished, the micro centrifugal pump 20 is started through the second touch switch 7, the water suction head 17 is placed in the cleaned area, water is gathered through the brush scraper 21 and the straight scraper 22, and the water is sucked into the recovery water tank 3 from the water suction pipe 18 through negative pressure;

step five: the second rubber plug 31 is opened, the wastewater in the recovery water tank 3 is discharged, the second rubber plug 31 is covered, the shell 1 is placed on the seat body 23, the electromagnetic sensor receiving end 8 and the electromagnetic sensor transmitting end 26 are matched with each other, the power line is inserted into the charging port 29, and the energy storage battery 5 is charged.

The use principle is as follows: the utility model is a hand-held cleaning machine, which has small volume and is convenient to carry; a hose box 24 is arranged in the charging seat, a hose 35 can be placed in the hose box 24, and ozone can be added into the water in the water storage tank 2 at any time through an ozone generator 25 in the charging seat so as to improve the cleaning effect; a plunger pump mechanism and a centrifugal pump mechanism are arranged in the shell 1, water is sprayed on an area to be cleaned through the plunger pump mechanism, and the cleaned sewage can be recovered through the centrifugal pump mechanism, so that the matching of cleaning tools of traditional rags or mops is not needed, and the convenience is greatly improved; the first touch switch 6 and the second touch switch 7 for controlling the motor 12 and the micro centrifugal pump 20 are respectively arranged at two sides of the handle 4, so that the operation is very convenient; a brush scraper 21 and a straight scraper 22 are arranged on a water suction head 17 of the centrifugal pump mechanism, and the collection of sewage is facilitated while the cleaning is matched; wireless charging is adopted, and the mobility is greatly improved when the mobile phone is taken and used; the first rubber plug 30 and the second rubber plug 31 are adopted to respectively plug the water storage tank 2 and the recovery water tank 3, when the water storage tank is used, the water leakage condition can not occur, and after the water storage tank is used, water adding or water discharging is facilitated.

The details of the present invention are well known to those skilled in the art.

Finally, it is to be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified and replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. A cleaning machine is characterized in that: comprises a host, a plunger pump mechanism, a centrifugal pump mechanism and a charging seat;

the main machine comprises a shell (1), a water storage tank (2) and a recovery water tank (3); a handle (4) is arranged at the rear end of the shell (1), a plurality of energy storage batteries (5) are arranged in the handle (4), a first touch switch (6) and a second touch switch (7) are respectively arranged on two sides of the handle (4), a water storage tank (2) and a recovery water tank (3) are arranged in the shell (1), the water storage tank (2) is arranged at the upper end of the recovery water tank (3), and an electromagnetic sensor receiving end (8) is further arranged on the lower surface of the shell (1);

the plunger pump mechanism comprises a sleeve (9), a spray pipe (10), a piston (11) and a motor (12), a water inlet pipe (13) is arranged at the top end of the sleeve (9), one end of the sleeve (9) is connected with the spray pipe (10), the spray pipe (10) is arranged in the shell (1), one end, far away from the sleeve (9), of the spray pipe (10) is arranged at the front end of the shell (1), the piston (11) is arranged inside the sleeve (9), the piston (11) is connected with a connecting rod (14), one end, far away from the piston (11), of the connecting rod (14) is connected with a mouse tooth disc (15), a gear (16) is arranged on an output shaft of the motor (12), and the gear (16) is meshed with the mouse tooth disc (15);

the centrifugal pump mechanism comprises a water suction head (17), a water suction pipe (18), an air pipe (19) and a micro centrifugal pump (20), wherein the water suction head (17) is arranged at the front end of the shell (1), a brush scraper (21) and a straight scraper (22) are arranged on the water suction head (17), the water suction head (17) is connected with the water suction pipe (18), the water suction pipe (18) is arranged inside the shell (1), one end, far away from the water suction head (17), of the water suction pipe (18) is connected with the recovery water tank (3), the air pipe (19) is connected with the micro centrifugal pump (20), the air pipe (19) and the micro centrifugal pump (20) are both arranged in the shell (1), and the air pipe (19) is connected with one end, far away from the water suction pipe (18), of the;

the charging seat comprises a seat body (23), a hose box (24) and an ozone generator (25), the upper surface of the seat body (23) is matched with the lower surface of the shell (1), the upper surface of the seat body (23) is provided with an electromagnetic sensor transmitting end (26), the electromagnetic sensor transmitting end (26) is matched with an electromagnetic sensor receiving end (8), the front end of the seat body (23) is provided with the hose box (24), the ozone generator (25) is arranged inside the seat body (23), the ozone generator (25) is connected with a connecting pipe (27), the connecting pipe (27) is arranged inside the seat body (23), and the two sides of the seat body (23) are respectively provided with a third touch switch (28) and a charging port (29).

2. A cleaning machine according to claim 1, characterized in that: the upper end of the water storage tank (2) is provided with a water inlet, the upper surface of the shell (1) is further provided with a first rubber plug (30), and the first rubber plug (30) is matched with the water inlet of the water storage tank (2).

3. A cleaning machine according to claim 1, characterized in that: the lower surface of the recovery water tank (3) is provided with a water outlet, the lower surface of the shell (1) is further provided with a second rubber plug (31), and the second rubber plug (31) is matched with the water outlet of the recovery water tank (3).

4. A cleaning machine according to claim 1, characterized in that: the connecting pipe (27) is fixed in the seat body (23) through a support (32), one end, far away from the ozone generator (25), of the connecting pipe (27) is connected with a connector (33), and the connector (33) penetrates through and is fixed on the seat body (23).

5. A cleaning machine according to claim 1, characterized in that: the lower surface of the hose box (24) is provided with a box cover (34), a hose (35) is movably arranged in the hose box (24), one end of the hose (35) is matched with a connector (33) at one end of the connecting pipe (27), and the other end of the hose (35) is movably arranged in the water storage tank (2) through a water inlet.

6. A cleaning machine according to claim 1, characterized in that: one end of the water inlet pipe (13) connected with the sleeve (9) and one end of the water spray pipe (10) connected with the sleeve (9) are both provided with one-way valves.

7. A cleaning machine according to claim 1, characterized in that: the first touch switch (6) is connected with the motor (12) and the energy storage battery (5) through leads respectively, the second touch switch (7) is connected with the micro centrifugal pump (20) and the energy storage battery (5) through leads respectively, and the energy storage battery (5) is connected with the electromagnetic sensor receiving end (8) through leads.

8. A cleaning machine according to claim 1, characterized in that: the base body (23) is internally provided with a PCB (36), the PCB (36) is respectively connected with the charging port (29) and the electromagnetic sensor transmitting end (26), and the PCB (36) is also respectively connected with the third touch switch (28) and the ozone generator (25) through wires.

9. A cleaning machine according to claim 1, characterized in that: the lower surface of the mouse tray (15) is provided with an eccentric column (37), one end, far away from the piston (11), of the connecting rod (14) is provided with a limiting sleeve (38), the eccentric column (37) is movably arranged in the limiting sleeve (38), the limiting sleeve (38) is provided with a guide groove, and a shaft core of the mouse tray (15) is arranged in the guide groove of the limiting sleeve (38).